Wmd Guns194201480
WMD NIB-X BCG 450 BUSHMASTER$157.35
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Availability: In Stock
The WMD Guns NiB-X bolt carrier group for 7.62×39 is purpose-built for shooters running intermediate cartridge AR platforms—whether you're cycling Soviet-spec ammo through a short-barrel rifle, running a suppressor, or just want a BCG that shrugs off carbon and stays slick. The NiB-X nickel boron coating is what sets this apart: it reduces fouling adhesion, stays smooth under heavy use, and comes with a lifetime guarantee against chipping, spalling, or flaking. WMD stress-tested these groups through over 30,000 rounds under government protocol endurance testing without wearing through the coating, so you're looking at a part that'll outlast the rifle.
Every component is manufactured and heat-treated to exacting specs. The bolt is 9310 case-hardened material, shot-peened and magnetically inspected. The firing pin and cam pin are both manufactured and hardened per government drawings. The gas key is hardened to USGI spec and locked down with grade 8 fasteners—no wobble, no drift. The carrier itself is M4/16-style full-auto (the heavier profile) and functions reliably in standard AR15 and M4/16 platforms; it's made from 8620 material, heat-treated and case-hardened for durability.
Clean-up is noticeably easier than a standard phosphate BCG, and the smooth coating means less wear on your receiver extension and carrier rail over time. If you're building a dedicated 7.62×39 AR or upgrading an existing rifle, this is a no-compromise choice.
| Caliber | 7.62×39 |
| Coating | NiB-X nickel boron |
| Bolt Material | 9310 case-hardened, shot-peened, magnetic particle inspected |
| Carrier Material | 8620 steel, heat-treated and case-hardened |
| Carrier Style | M4/16 full-auto (heavier profile) |
| Firing Pin | Manufactured, heat-treated, hardened, chromed, certified per government drawings |
| Gas Key | Hardened to USGI specification, grade 8 fastener attachment |
| Platform Compatibility | AR15 and M4/16 platforms |
| Coating Warranty | Lifetime against chipping, spalling, or flaking |
The WMD Guns NiB-X BCG is designed for AR15 and M4/16 platform rifles chambered in 7.62×39. The M4/16-style carrier (full-auto profile, heavier weight) functions in both platform types.
NiB-X nickel boron coating reduces the amount of carbon and fouling that sticks to the carrier and bolt, making cleanup significantly easier. It also provides a smoother surface, which means less wear on internal components and the receiver extension. The coating comes with a lifetime guarantee against chipping, spalling, or flaking—WMD tested theirs through over 30,000 rounds without the coating breaking down.
Yes. The NiB-X coating and engineered design make this BCG especially suitable for suppressed setups and short-barrel rifles, where additional fouling and higher pressure cycling can stress standard carriers.
The product is the complete bolt carrier group for 7.62×39; it includes the carrier, bolt, firing pin, extractor, gas key, and cam pin—everything needed to function in a 7.62×39 AR build.
SKU: 167516514 • Width: 4in • Height: 1.5in • Depth: 11in • Weight: 13.1oz
Availability: In Stock
The WMD Guns NiB-X bolt carrier group for 7.62×39 is purpose-built for shooters running intermediate cartridge AR platforms—whether you're cycling Soviet-spec ammo through a short-barrel rifle, running a suppressor, or just want a BCG that shrugs off carbon and stays slick. The NiB-X nickel boron coating is what sets this apart: it reduces fouling adhesion, stays smooth under heavy use, and comes with a lifetime guarantee against chipping, spalling, or flaking. WMD stress-tested these groups through over 30,000 rounds under government protocol endurance testing without wearing through the coating, so you're looking at a part that'll outlast the rifle.
Every component is manufactured and heat-treated to exacting specs. The bolt is 9310 case-hardened material, shot-peened and magnetically inspected. The firing pin and cam pin are both manufactured and hardened per government drawings. The gas key is hardened to USGI spec and locked down with grade 8 fasteners—no wobble, no drift. The carrier itself is M4/16-style full-auto (the heavier profile) and functions reliably in standard AR15 and M4/16 platforms; it's made from 8620 material, heat-treated and case-hardened for durability.
Clean-up is noticeably easier than a standard phosphate BCG, and the smooth coating means less wear on your receiver extension and carrier rail over time. If you're building a dedicated 7.62×39 AR or upgrading an existing rifle, this is a no-compromise choice.
| Caliber | 7.62×39 |
| Coating | NiB-X nickel boron |
| Bolt Material | 9310 case-hardened, shot-peened, magnetic particle inspected |
| Carrier Material | 8620 steel, heat-treated and case-hardened |
| Carrier Style | M4/16 full-auto (heavier profile) |
| Firing Pin | Manufactured, heat-treated, hardened, chromed, certified per government drawings |
| Gas Key | Hardened to USGI specification, grade 8 fastener attachment |
| Platform Compatibility | AR15 and M4/16 platforms |
| Coating Warranty | Lifetime against chipping, spalling, or flaking |
The WMD Guns NiB-X BCG is designed for AR15 and M4/16 platform rifles chambered in 7.62×39. The M4/16-style carrier (full-auto profile, heavier weight) functions in both platform types.
NiB-X nickel boron coating reduces the amount of carbon and fouling that sticks to the carrier and bolt, making cleanup significantly easier. It also provides a smoother surface, which means less wear on internal components and the receiver extension. The coating comes with a lifetime guarantee against chipping, spalling, or flaking—WMD tested theirs through over 30,000 rounds without the coating breaking down.
Yes. The NiB-X coating and engineered design make this BCG especially suitable for suppressed setups and short-barrel rifles, where additional fouling and higher pressure cycling can stress standard carriers.
The product is the complete bolt carrier group for 7.62×39; it includes the carrier, bolt, firing pin, extractor, gas key, and cam pin—everything needed to function in a 7.62×39 AR build.
SKU: 167516514 • Width: 4in • Height: 1.5in • Depth: 11in • Weight: 13.1oz